nobelium(redirected from Unnilbium)
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n. Symbol No
A radioactive transuranic element in the actinide series artificially produced in trace amounts. Its most long-lived isotopes are No-255 with a half-life of 3.1 minutes, and No-259 with a half-life of 58 minutes. Atomic number 102; valence 2, 3. See Periodic Table.
[After Alfred Bernhard Nobel.]
(Elements & Compounds) a transuranic element produced artificially from curium. Symbol: No; atomic no: 102; half-life of most stable isotope, 255No: 180 seconds (approx.); valency: 2 or 3
[C20: New Latin, named after Nobel Institute, Stockholm, where it was discovered]
no•bel•i•um(noʊˈbɛl i əm, -ˈbi li-)
a transuranic element in the actinium series. Symbol: No; at. no.: 102.
[1957; named in honor of Alfred Nobel and the Nobel Institute for Physics in Stockholm]
Symbol No A synthetic, radioactive metallic element in the actinide series that is produced by bombarding curium with carbon ions. Its most stable isotope has a half-life of about three minutes. Atomic number 102. See Periodic Table.
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|Noun||1.||nobelium - a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known|